Sweeping robot and water tank

ABSTRACT

The present disclosure discloses a cleaning robot and a water tank for a cleaning robot. The water tank for the cleaning robot includes a water tank body having an inner cavity and a partition disposed inside the water tank body. Two ends of the partition abut an inner wall of the water tank body so as to divide the inner cavity of the water tank body into a first cavity and a second cavity. The first cavity communicates with the first pipe, and the second cavity communicates with the second pipe. A first connecting hole and a second connecting hole are respectively defined on the water tank body and respectively correspond to the first cavity and the second cavity. Under external force, both ends of the partition move along the inner wall of the water tank body to adjust the capacity of the first cavity and the second cavity.

RELATED APPLICATIONS

This application is a continuation-in-part of and claims priority to PCT/CN2018/076690, filed on Feb. 13, 2018, which is incorporated herein by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to the technical field of cleaning equipment, in particular to a sweeping robot and a water tank for a sweeping robot.

BACKGROUND OF THE DISCLOSURE

Sweeping robots are self-cleaning devices that reduce the pressure on people to clean. Sweeping robots generally use the structure of roller brushes, rollers, sinks, and water tanks. Clean water is provided to the roller from one end of the water tank, and sewage discharged from the roller is sucked into the sewage tank through negative pressure. The clean water tank and the sewage tank are separated, which greatly diminish practical spacer of the clean equipment.

SUMMARY OF THE DISCLOSURE

According to various embodiments of the present application, a water tank for a sweeping robot is provided. In order to achieve the purpose of the present disclosure, the present disclosure adopts the following technical solutions: A water tank for a cleaning robot, comprising: a water tank body. The water tank body has an inner cavity, and a partition is disposed in the water tank body. Two ends of the partition abut against the inner wall of the water tank body respectively, so as to separate the inner cavity of the water tank body into a first cavity and a second cavity. The first cavity communicates with a first pipe, and the second cavity communicates with a second pipe. The water tank further comprises a first connecting hole and a second connecting hole, wherein the first connecting hole and the second connecting hole are each defined by the water tank body and correspond to the first cavity and the second cavity, respectively. Under external force, both ends of the partition move along the inner wall of the water tank body to adjust the capacities of the first cavity and the second cavity.

The details of one or more embodiments of the disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the disclosure will be apparent from the description and drawings, and from the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present disclosure or the technical solutions relative to the prior art, the drawings to be used in the description of the embodiments or the prior art will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those skilled in the art, drawings of other embodiments can also be obtained based on these drawings without any creative work.

FIG. 1 is a schematic perspective view of a cleaning robot according to an embodiment of the present disclosure, wherein the water tank body is in an open state;

FIG. 2 is a schematic perspective view of a cleaning robot according to another embodiment of the present disclosure, wherein the water tank is separated into a clean water sink and a sewage sink;

FIG. 3 is a side view of a cleaning robot according to another embodiment of the present disclosure, wherein the water tank is separated into a clean water tank and a sewage tank;

FIG. 4 is a front view of another perspective of the cleaning robot described in FIG. 1;

FIG. 5 is a front view of a cleaning robot according to another embodiment of the present disclosure;

FIG. 6 is a front view of a cleaning robot according to another embodiment of the present disclosure; and

FIG. 7 is a schematic perspective view of a cleaning robot according to another embodiment of the present disclosure, wherein the water tank is removed.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To facilitate the understanding of the present disclosure, the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the disclosure are given in the accompanying drawings. However, the present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be noted that when an element is referred to as being “fixed” to another element, it may be directly on the other element or there may also be an intervening element. When an element is considered to “connect” another element, it can be directly connected to another element or there may be an intervening element. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the present disclosure herein is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure.

Embodiment 1

Referring to FIGS. 1-4, a cleaning robot 100 according to an embodiment of the present disclosure includes a flexible roller 10, a roller motor 11 for driving the flexible roller 10 to rotate, and a water sink 30. A gap is defined between the flexible roller 10 and the water sink 30. The cleaning robot 100 further comprises a first pipe 55 and a second pipe 56 respectively connected to the water sink 30 and the water tank 50. The cleaning robot 100 further comprises a pressing member 35 for deforming the flexible roller 10 to press out sewage and a roller brush 20 on a long side of the flexible roller 10. The bristles of the roller brush 20 are in contact with the flexible roller 10, and at least a portion of a garbage collection box 40 is located below the roller brush 20. The flexible roller 10 is driven by the roller motor 11 to rotate to attach solid waste thereto, sweep the solid waste into the garbage collection box 40, and absorb liquid waste in the flexible roller 10. Clean water in the water sink 30 flows into the flexible roller 10 to provide the flexible roller 10 with clean water.

When the flexible roller 10 cleans the ground, the flexible roller 10 absorbs the liquid waste on the ground and the sewage mixed therewith. When the flexible roller 10, which has absorbed the sewage, rotates against the pressing member 35, a contacted portion of the flexible roller 10 is compressed by the pressing member 35. The resulting compression causes the sewage absorbed by the flexible roller 10 to be pressed upwards, causing the sewage to have an upward pressure and flow upward. In addition, the flexible roller 10 generates an upward deformation on both sides of the compressed portion of the flexible roller 10, so that the side of the compressed portion of the flexible roller 10 that was originally round or nearly round fills the gap between the flexible roller 10 and the water sink 30. The discharged sewage is upwardly driven due to the upward pressure and pressed into the water sink 30 upwards. When the upward pressure generated by the deformation is greater than the gravity of the sewage stored in the water sink 30 plus the sewage stored in the second pipe 56 (i.e., the sewage pipe), the sewage flows into the water sink 30, enabling the sewage to be recovered.

The rotary shaft of the flexible roller 10 is made of a hard material, and the outer peripheral portion thereof is made of a flexible material, for example, made of a sponge, a cotton cloth, etc. Clean water is easily absorbed due to the porosity of the material and the surface cleaning power, and it is easy to clean the ground. The flexible roller 10 is driven and rotated by the roller motor 11, and the roller motor 11 is also mounted inside the rotary shaft of the flexible roller. The rotation speed of the flexible roller 10 will affect the cleaning ability of the cleaning robot 100, so it is necessary to reasonably set the rotation speed of the flexible roller 10 and to use different rotation speeds when cleaning different environments. The basic principle is that the sweeping torque of a specific speed level which is horizontal to the ground must be greater than the total friction and stickiness of the solid waste on the ground. Alternatively, the specific speed of rotation must provide a force per unit area greater than or at least equal to the time required to complete the removal of garbage. Moreover, the downforce provided to the ground should be sufficient to affix the garbage to the flexible roller 10, so that the garbage can be completely applied to the above-mentioned level for the sweeping torque which is horizontal to the ground to achieve the effect of cleaning the ground. For example, the rotational speed of the flexible roller 10 may be set at 50-140 revolutions per minute (rpm). In a preferred embodiment, the rotational speed of the flexible roller 10 may be set at 70 rpm. The smoother the ground (i.e., the lower the friction on the ground) the smaller the required rotation speed.

In FIG. 1, the water sink 30 is disposed above the flexible roller 10, and an array of water holes 32 is disposed at the bottom of the water sink 30. A water inlet 201 and a water outlet 202 are disposed on opposite sides of the array of the water holes. The water inlet 201 and the water outlet 202 communicate with the water tank 50, so that the clean water in the water tank 50 flows into the water sink 30 through the water inlet 201. The clean water in the water sink 30 flows through the water holes 32 to the flexible roller 10, and the sewage in the water sink 30 flows out through the water outlet 202 to the water tank 50.

Please refer to FIGS. 2 and 3. In order to avoid mixing of clean water and sewage and affecting the cleaning effect of the cleaning robot 100, the water sink 30 includes a clean water sink 301 and a sewage sink 302. The sewage sink 302 is separate from the clean water sink 301. The clean water sink 301 supplies the clean water to the flexible roller 10, and the sewage sink 302 collects the water discharged from the flexible roller 10. Correspondingly, the array of water holes 32 includes a clean water hole 21 and a sewage hole 31.

Referring to FIG. 2, the clean water sink 301 and the sewage sink 302 are both disposed above the flexible roller 10. The sewage sink 302 is disposed on one side of the clean water sink 301 and is separated from the sewage sink 302. The clean water hole 21 is disposed at the bottom of the clean water sink 301. The clean water hole 21 of the clean water sink 301 faces the flexible roller 10 so that clean water in the clean water sink 301 can flow through the clean water hole 21 to the flexible roller 10. The sewage hole 31 is disposed at the bottom of the sewage sink 302. The sewage sink 302 faces the flexible roller 10 so that sewage can flow from the flexible roller 10 through the sewage hole 31 to the sewage sink 302. One side of the clean water sink 301 is provided with a water inlet 201. The water inlet 201 is connected with the water tank 50 through the first pipe (i.e., a clean water pipe). The clean water in the water tank 50 enters the clean water sink 301 through the water inlet 201, and the clean water in the clean water sink 301 enters the flexible roller 10 through the clean water hole 21. A water outlet 202 is provided on one side of the sewage sink 302, and the amount of sewage flowing out through the water outlet 202 can be controlled by providing a solenoid valve at the water outlet 202. When the waste water has accumulated in the sewage sink 302, the waste water may be discharged to the water tank 50 through the water outlet 202. In this embodiment, in order to prevent backflow of clean water, the water inlet 201 is disposed at an upper portion of the side surface of the clean water sink 301, and the clean water hole 21 is disposed at the bottom of the clean water sink 301.

Referring to FIG. 3, a clean water sink 301 is disposed above the flexible roller 10, for example. A clean water hole 21 is disposed at the bottom or side of the clean water sink 301, and the clean water sink 301 communicates with the flexible roller 10 through the clean water hole 21. The sewage sink 302 is located at one side of the clean water sink 301. The sewage sink 302 is provided with a sewage hole 31. The sewage sink 302 faces the flexible roller 10 through the sewage hole, so that sewage discharged from the flexible roller 10 passes through the sewage hole 31 and reaches the sewage sink 302 and is discharged.

Referring to FIGS. 1 and 2, the pressing member 35 is made of a material with a low coefficient of elasticity so as to press the flexible roller 10. For example, the pressing member 35 may be made of a wooden material, a plastic material, a metal material, etc. to achieve the above-mentioned purpose. It is also possible to use a plurality of materials in combination. For example, the main body may be formed from plastic, and a metal layer reinforcement may be applied on the contact surface where the contact pressure is at the highest.

Referring to FIG. 2, the pressing member 35 is a press roller. The press roller has a cylindrical shape. The press roller is disposed near the water sink 30 to press waste water into the water sink 30, and the surface of the press roller is pressed onto the surface of the flexible roller 10. In other embodiments, the press roller may have spherical shape or the like. The press roller presses the flexible roller 10 so that the surface of the flexible roller 10 forms a depression 13. The size of the portion of the press roller located in the depression 13 is ¼-½ of the radius or diameter of the press roller. This does not affect the normal rotation of the flexible roller 10 and is sufficient to press out the sewage. Of course, the flexible roller 10 can also be rotated when the portion of the press roller located in the depression 13 is larger than ¼-½ of the radius or diameter of the press roller. In this embodiment, the size of the portion of the press roller located in the depression 13 is ⅓ of the radius or diameter of the press roller. This size is a preferred pressing size. When the flexible roller 10 rotates, the press roller exerts downward pressure on the flexible roller 10, so that the flexible roller 10 on the side near the water sink 30 is close to the sewage hole 31 of the water sink 30. In this way, a large proportion of the sewage enters the water sink 30, so spillage of sewage that may pollute the cleaned ground is avoided.

In a preferred embodiment, through the sealing of the sewage sink, and the ratio of the sewage entering the sewage sink 302 due to the upward pressure reaches 85%-95%. Further, when the sewage sink 302 is separated from the clean water sink, the press roller is located on one side of the sewage sink 302. Through the foregoing configuration, this embodiment discloses a cleaning robot that does not need to generate a negative pressure through an air pump during the recovery of sewage, but uses the upward pressure generated when the sewage is pushed into the water sink 30 to introduce the sewage into the sewage sink 302. The aforementioned technology can reduce costs and failure rates without using air pumps, thus having an advantage over the competition.

It can be understood that the number of press rollers may be one or several, and a plurality of press rollers may be provided without affecting the normal operation of the cleaning robot 100. In this embodiment, the number of press rollers is one, and the press roller and the roller brush 20 are located on opposite sides of the water sink 30.

Referring to FIGS. 1 and 2, the roller brush 20 is located above the side of the flexible roller 10, and the roller brush 20 is driven by the roller brush motor 23. When the flexible roller 10 rotates, the roller brush 20 rotates in the opposite direction of the flexible roller 10, thereby removing the dirt on the flexible roller 10. The dirt falls into the garbage collection box 40 below, thereby removing the dirt. The garbage collection box 40 is disposed in the direction of rotation of the flexible roller 10, and a gap is defined between the garbage collection box 40 and the flexible roller 10. The garbage collection box 40 is located on one side of the flexible roller 10 and is located directly below the roller brush 20. The solid garbage is thrust into the garbage collection box 40 in the forward direction by the flexible roller 10, and any remaining garbage is brushed off the flexible roller 10 by the roller brush 20. The garbage collection box 40 is U-shaped, but is arranged in a square shape at the corners.

Referring to FIGS. 1 and 4, a water tank 50 for the cleaning robot 100 is used to hold clean water for cleaning the flexible roller 10 and sewage generated by the flexible roller 10. The water tank 50 is a closed structure, which can prevent water in the water tank 50 from overflowing. The entire system is closed so that the sewage enters the water sink 30 or the sewage sink 302. In this embodiment, the water tank 50 for the cleaning robot includes a water tank body 51 and a partition 52 disposed in the water tank body 51. The water tank body 51 has an inner cavity, and both ends of the partition 52 abut against the inner wall of the water tank body 51. The inner cavity of the water tank body 51 is divided into a first cavity 53 for containing clean water or sewage, and a second cavity 54 for containing sewage or fresh water. The two ends of the partition 52 can move along the inner wall of the water tank body 51 to adjust the capacities of the first cavity 53 and the second cavity 54 when an external force is applied. Therefore, the volume of the water tank body can be reduced and can be flexible in use. The external force described above, which may be generated by a difference in water pressure between the first cavity 53 and the second cavity 54, may push the partition 52 to move.

In this embodiment, the first cavity 53 is used to hold clean water, and the second cavity 54 is used to hold. That is, the first pipe 55 is a clean water pipe, the first cavity 53 is a clean water cavity, the second pipe 56 is a sewage pipe, and the second cavity 54 is a sewage cavity. The first pipe 55 communicates with the water sink 30 through the water inlet 201 of the water sink 30 to provide clean water for the water sink 30, and the second pipe 56 communicates with the water sink 30 through the water outlet 202 of the water sink 30 and receives sewage from the water sink 30. Further, when the sewage sink 302 is separated from the clean water sink 301, the first pipe 55 communicates with the clean water sink 301 and the second pipe 56 communicates with the sewage sink 302.

In this embodiment, the partition 52 includes a moving member 520 and a guiding member 521. The moving member 520 abuts an inner wall of the water tank body 51. The guiding member 521 is movably connected to the water tank body 51. The moving member 520 moves along the water tank body 51 under the effect of water pressure. The partition 52 moves relative to the inner wall of the water tank body 51 to adjust the capacities of the first cavity 53 and the second cavity 54. For example, when the volume of clean water entering the water tank body 51 is greater than the volume of the sewage entering the water tank body 51, the moving member 520 is subjected to the water pressure of the clean water and moves toward the sewage cavity. Conversely, when the volume of the sewage entering the water tank body 51 is greater than the volume of clean water entering the water tank body 51, the moving member 520 is subjected to the water pressure of the sewage and moves toward the clean water cavity.

In this embodiment, a guide hole 57 is defined in the side wall of the water tank body 51. The guiding member 521 is sealed and installed in the guide hole 57 to guide the movement of the moving member 520. Because the guiding member 521 is sealed and installed in the guide hole 57, water leakage does not occur. For example, a seal apron may be provided around the guide hole 57. Preferably, the guide hole 57 is defined at the top of the water tank body 51. In this way, water leakage from the water tank body 51 through the guide hole 57 can be prevented. In other embodiments, the guide hole 57 is defined at other positions of the water tank body 51. In this embodiment, the guiding member 521 is movably connected to the left or right side of the water tank body 51. That is, the guide hole 57 is defined on the left or right side of the water tank body 51. The first pipe 55 communicates with the right side of the water tank body 51, and the second pipe 56 communicates with the left side of the water tank body 51.

Further, a water pump 58 is disposed on the first pipe 55 to provide power for the clean water to enter the water sink 30. The second cavity 54 is in communication with a vacuum pump 59. The vacuum pump 59 can increase the negative pressure for the second cavity 54 to pull the sewage in the water sink 30 into the second cavity 54. Still further, a blade 41 is provided on the side of the garbage collection box 40 near the flexible roller 10 for scraping the garbage on the flexible roller 10. A load-bearing wheel 60 is disposed between the bottom of the garbage collection box 40 and the bottom of the blade 41 for increasing the load-bearing capacity of the garbage collection box 44. Still further, a water level sensor is disposed on the inner wall of the second cavity 54 at the top, and an alarm is disposed on the cleaning robot 100. The alarm is electrically connected with the water level sensor. When the second cavity 54 is full of sewage, the water level sensor senses the water level and sends a signal to the alarm. The alarm sounds or flashes according to the signal to alert the user to empty the second cavity 54.

Embodiment 2

Referring to FIG. 5, the cleaning robot 200 of the present embodiment differs from the first embodiment in that the guiding member 521 of the water tank body 51 for the cleaning robot 200 is movably connected to the top or bottom of the water tank body 51. That is, the guide hole 57 is disposed at the top or bottom of the water tank body 51. The first pipe 55 communicates with the water tank body 51 at a lower position, and the second pipe 56 communicates with the water tank body 51 at an upper position.

For example, referring to FIG. 5, the guide hole 57 is disposed at the top of the water tank body 51. At this time, the lower portion of the water tank body 51 is a clean water cavity and the upper portion is the sewage cavity. The first pipe 55 is a clean water pipe and is connected to the water tank body 51. The bottom of the water tank body 51 is connected to the water inlet 201 or the clean water sink 301 of the water sink 30 through the first pipe 55. The second pipe 56 is a sewage pipe. The second pipe 56 communicates with the upper portion of the water tank body 51 and communicates with the water outlet 202 or the sewage sink 302 of the water sink 30.

For another example, the guide hole 57 is disposed at the bottom of the water tank body 51. In this embodiment, the upper portion of the water tank body 51 is a clean water cavity and the lower portion is the sewage cavity. The first pipe 55 and the second pipe 56 are interchangeable with each other.

Embodiment 3

Referring to FIG. 6, the cleaning robot 300 of this embodiment is different from the first embodiment is that the partition 52 includes a loose leaf 522 and a rotating shaft 523 pivotally connected to the loose leaf 522. The loose leaf 522 includes a first partition 524 and a second partition 525. The first partition 524 and the second partition 525 are respectively pivotally connected to the rotating shaft 523 to rotate along the rotating shaft 523 under water pressure. The first partition 524 and the second partition 525 respectively abut against the water tank body 51. The rotating shaft 523 is connected to the water tank body 51, so that the first cavity 53 and the second cavity 54 are formed between the first partition 524 and the second partition 525. When the water pressure on one side is relatively high, the first partition 524 and the second partition 525 move in opposite directions to adjust the capacities of the first cavity 53 and the second cavity 54.

Embodiment 4

Referring to FIG. 7, the cleaning robot 400 of the present embodiment is different from the first embodiment is that the pressing member 35 is a protrusion provided at the bottom of the water sink 30. The protrusion may be provided at the bottom edge of the water sink 30, or may be located in the bottom middle of the water sink 30. In the present embodiment, the protrusion is provided on the bottom edge of the water sink 30 and is integrally formed with the water sink 30. When the flexible roller 10 is rotated, the projection generates downward pressure on the flexible roller 10, so that the flexible roller 10 on the side near the water sink 30 is close to the sewage hole 31 of the water sink 30. In this way, a large proportion of the sewage enters the water sink 30, so that spillage of sewage onto the cleaned ground is avoided. Further, the protrusion is located at the bottom of the sewage sink 302 when the sewage sink 302 is separated from the clean water sink 301. The above-mentioned embodiments merely represent several embodiments of the present disclosure, and the description thereof is more specific and detailed, but it should not be understood as a limitation of the scope of the present disclosure. It should be noted that, for those skilled in the art, several variations and improvements may be made without departing from the concept of the present disclosure, and these are all within the protection scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be subject to the appended claims.

The technical features of the above described embodiments may be combined in any combination. In order to succinctly describe the description, all possible combinations of the various technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope of the present specification.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed. It is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be determined by the appended claims. 

1. A water tank for a cleaning robot, comprising: a water tank body, wherein the water tank body has an inner cavity; and a partition disposed in the water tank body, wherein: two ends of the partition abut an inner wall of the water tank body so as to separate the inner cavity of the water tank body into a first cavity and a second cavity, a first pipe is connected to the first cavity, a second pipe is connected to the second cavity, and under external force, the two ends of the partition move along the inner wall of the water tank body to adjust a capacity of the first cavity and a capacity of the second cavity.
 2. The water tank for cleaning robot according to claim 1, wherein: the partition comprises a moving member and a guiding member, the moving member abuts the inner wall of the water tank body, and the guiding member is movably connected to the water tank body and moves under the external force or water pressure along the inner wall of the water tank body to adjust the capacity of the first cavity and the capacity of the second cavity.
 3. The water tank for a cleaning robot according to claim 2, wherein: a guide hole is defined in a side wall of the water tank body, and the guiding member is sealed in the guide hole.
 4. The water tank for a cleaning robot according to claim 3, wherein the guide hole is disposed at a position near a top of the water tank body.
 5. The water tank for a cleaning robot according to claim 2, wherein: the guiding member is movably connected to a left side or a right side of the water tank body, the first pipe is connected to the left side of the water tank body, and the second pipe is connected to the right side of the water tank body.
 6. The water tank for a cleaning robot according to claim 2, wherein: the guiding member is movably connected to a top or bottom of the water tank body, the first pipe communicates with the water tank body in a lower position, and the second pipe communicates with the water tank body in an upper position.
 7. The water tank for a cleaning robot according to claim 1, wherein: the partition comprises a loose leaf and a rotating shaft pivotally connected to the loose leaf, the loose leaf comprises a first partition and a second partition, the first partition and the second partition abut the water tank body, the rotating shaft connects the water tank body, and under water pressure, the first partition and the second partition moves along with the inner wall of the water tank body to adjust a capacity of the first cavity and a capacity of the second cavity.
 8. A cleaning robot, comprising: a flexible roller; a roller brush located on one side of the flexible roller; a water sink above the flexible roller; a first pipe communicating with the water sink; a second pipe; a pressing member; and a water tank comprising: a water tank body, wherein the water tank body has an inner cavity; and a partition disposed in the water tank body, wherein: two ends of the partition abut an inner wall of the water tank body so as to separate the inner cavity of the water tank body into a first cavity and a second cavity, the first pipe is connected to the first cavity, the second pipe is connected to the second cavity, and under external force, the two ends of the partition move along the inner wall of the water tank body to adjust a capacity of the first cavity and a capacity of the second cavity.
 9. The cleaning robot according to claim 8, wherein the first pipe provided a water pump.
 10. The cleaning robot according to claim 8, wherein the second cavity is connected to a vacuum pump.
 11. The cleaning robot according to claim 8, wherein: the partition comprises a moving member and a guiding member, the moving member abuts the inner wall of the water tank body, and the guiding member is movably connected to the water tank body and moves under the external force or water pressure along the inner wall of the water tank body to adjust the capacity of the first cavity and the capacity of the second cavity.
 12. The cleaning robot according to claim 11, wherein: a guide hole is defined in a side wall of the water tank body, and the guiding member is sealed in the guide hole.
 13. The cleaning robot according to claim 12, wherein the guide hole is disposed at a position near a top of the water tank body.
 14. The cleaning robot according to claim 11, wherein: the guiding member is movably connected to a left side or a right side of the water tank body, the first pipe is connected to the left side of the water tank body, and the second pipe is connected to the right side of the water tank body.
 15. The cleaning robot according to claim 11, wherein: the guiding member is movably connected to a top or bottom of the water tank body, the first pipe communicates with the water tank body in a lower position, and the second pipe communicates with the water tank body in an upper position.
 16. The cleaning robot according to claim 8, wherein: the partition comprises a loose leaf and a rotating shaft pivotally connected to the loose leaf, the loose leaf comprises a first partition and a second partition, the first partition and the second partition abut the water tank body, the rotating shaft connects the water tank body, and under water pressure, the first partition and the second partition moves along with the inner wall of the water tank body to adjust a capacity of the first cavity and a capacity of the second cavity.
 17. The cleaning robot according to claim 8, wherein the water sink comprises a clean water sink and a sewage sink separated from the clean water sink.
 18. The cleaning robot according to claim 8, wherein the roller brush is located on one side of the water sink and the pressing member is located on another side of the water sink. 